DB:

There is no information, to date, that can lead to the answer to that question, which is, 'What happens to the global 120 Hz. LFE filter when the analog BM is engaged?'.

The test described above is for digital only because, of course, there is only 'on' or 'off' of an 80 Hz. X-over in the analog BM.
The analog BM scheme is:
1. A global 120 Hz. LP filter on the LFE signal.
2. An 80 Hz. LP(redirected)/HP X-over on the 5 sats, or...
3. An 80 Hz. LP filter(redirected),and full range signal on the 5 sats.

My guess is that the global LFE filter is left intact in both '2' and '3' above. I can't test for it because I don't derive the LFE from the 950 when in '5.1 bypass' mode.
Anyone got an RTA and some time?